Apparatus for boiling by electricity.



No. 727,848. PATENTRD MAY l2, 1903.

R. C. SAYRR. APPARATUS POR BOILING BY ELECTRICITY.

APPLICATION FILED JUNI'. 25, 1900.

2 SHEETS-SHEET 1.

No. 727,848. PATENTED MAY 12, 190s. R. G. SAYER.

l APPARA'TUS FOR BOILING BY ELECTRICITY.

APPLIUATION FILED JUNE 25, 1900. v

NO MODEL. 2. SHEETS-SHEET 2.

ROBERT COOKE SAYER,

atented May 12, 1903.

PATENT OFFICE.

OF BRISTOL, ENGLAND.

APPARATUS FOR BOILING BY ELECTRICITY.

SPECIFICATION forming part of Letters Patent N o. 727 ,848, dated May 12, 1903.

Application led June 25, 1900.

To @ZZ whom it ma/Z/ concern.'

Be it known that I, ROBERTOOOKE SAYER, a subject of the Queen ot Great Britain and Ireland, and a resident of 11 Clyde road, Redland, Bristol, in the county ot Bristol, England, have invented certain new and useful Improvements in Electric Boilers, (for which I have made application for patent in Great Britain, No. 7,314, dated April 20, 1900;) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. The object ot' this invention is to boil and vaporize fluids by electricity by automatically supplying the fluid to an open vessel situated within a closed vessel and where it is heated by electrodes supplied with current automatically regulated by the pressure in .the vessel.

In the accompanying sheet of illustrative drawings, Figures 1 and 2 are vertical sections at right angles to one another of an apparatus constructed according to this invention, Fig. 1 being at ct b and Fig. 2 at o d ef on Fig. 3 and Fig. 3 is a horizontal section at g hj 7c on Fig. 2. Figs. 4 and 5 are sectional details at l m and ej', respectively, on Fig. 3. Fig. 6 is a part section showing the water-feeding device to a larger scale. Fig. 7 is a section showing the governor. Fig. 3 is a dragrammatic view showing the electrical connections.

The closed vessel 1 is provided with a safetyvalve 2, with a steam-delivery pipe 3,.,and with an opening 4 for drawing oft through a tap 9 any liquid at the bottom of the boiler 1. The open or evaporating vessel 25 is 'directly supported by the positive and negative electric terminals, that pass through openings 6 and 7 in the closed vessel 1. The terminals are in the secondary current-circuit 49 of the transformer 48. The primary circuit 50 of the transformer includes a switch 47, a rheostat 24, that is operated by a switch 17 actuated by the governor 12, and a switch 45, operated by a magnet 44 in a circuit 3 5, having a make-and-break device situated in a vessel 33 and which is closed by means of the plunger 31, operated by the float 26 when there is sufficient water in the evaporating vessel 25. The iioat works in the vessel 25,

Serial No. 21,509. (No model.)

as shown in Fig. 2, (orin an auxiliaryvessel 52, connected to the open vessel 25 and'closed vessel 1 by the pipes 53 and 54, respectively, as shown in Fig. 5.)

The governor comprises a cylinder 12, communicating at one end with the boiler 1 through the opening and provided with a piston 10, forced inward against the boilerpressure by a spring whose strength is adjusted by hand by screw-gear 15, screwing up the plunger 14 and gland 13, through which the piston-rod 11 passes. The piston-rod l1 is directly and suitably connected at 16 to the switch-lever 17, that passes over the contacts 18, 19, 20, 21, 22,'and 23 of the rheostat 24. y

The iluid to be evaporated is lirst admitted through the tap 39 into the vessel 38, that is connected at its bottom through the tap 36 with the water-inlet pipe 8 to the evaporating vessel and is connected at its top through the pipe 40 and tap 9 with the opening 4 at' the bottom ot the closed vessel 1. The three taps 39, 36, and 9 are coupled to gether and are operated simultaneously, so that when 39 is open 36 and 9 are closed by means of a solenoid 43, situated in the circuit 34, controlled by a switch 51, and that is opened and closed by the plunger in a vessel 32, Fig. 4, when the float 26 and its arm 27 and lever 28, centering at 29, rise to the required level. The cocks are returned to their initial positions by the spring 55.

The working is as follows, the parts being, as shown, all empty except the vessel 38: The switch 51 is closed. to send current from a source 46 through the circuit 34. The plunger 30, switch 5l, solenoid 43 so actuate the rod 42 to close the tap 39 and open taps 36 and 9. The iiuid passes from the vessel 38 through 36 and entrance 37 to charge the vessel 25. AsA the float 26 rises the plunger 30 breaks contact, and the solenoid 43 ceasing to act the spring 55 reverses the taps, opening 39 and closing 36 and 9, and allows the vessel 38 to be again charged from its fluidsupply. As the iioat rises the plunger 31 closes the circuit to send current through the magnet 44, which closes switch 45 in. the main circuit. When the switch 47 is closed by hand, a main current passes through the circuit 50, rheostat 24, switches 17 and 45,

IOC

converter 43. Currents are thus generated in the circuit 49 and pass through and heat the fluid in the vessel 25. As the iuid evaporates the float 26 falls, the plunger 3l in the circuit 35 breaks contact, the switch 45 breaks the circuit 50, and the plunger 30 makes contact in the circuit 34 to again reverse the taps 9, 36, and 39 to send another charge to the evaporating vessel 25. When pressure in the vessel l increases above the normal, (regulated by the screw-plunger 14,) the piston 10 is thrust outward against the pressure of the spring in the cylinder 12 and thrusts over the switch 17 to reduce the evaporation of the fluid in the vessel 25 by reducing current in the circuit as the switch 17 passes successively to the contacts 19 2O 2l 22 and cutting it off at the position 23. Should the pressure abnormallf,T increase in the vessels l and 25 and 52, it blows off at the valve 2.

To vary the normal pressnrein the vessels 1 3852, the plunger 14 is screwed in or out of the pipe l2 to vary the pressure ot' its spring against the piston l0.

In a modification the float 26 or pressure in the Vessel l actuates the taps 39, 36, and 9 and closes the break in the main circuit, the circuits 34 and 35 being dispensed with and also the switch 45, and the vessel 25 is carried by any means, but supplied with fluid, as above, which is vaporized by the heat of a suitable resistance wire or band. connecting the anode and cathode passing through the fluid. All three of the taps 39, 36, and 9 or only two of them are united as one with passages to effect the same purpose.

What I claim, and desire to secure by Letters Patent, is-

l. An evaporating apparatus or boiler, consisting of a closed vessel, an open vessel in the closed vessel, a means for heating the open vessel, a water-supply, a receiver or trap connected on top to a water-tank open at its top to the atmosphere and to the closed vessel, and at its bottom to the open vessel, three cocks for simultaneously closing the receiver to the water-supply and opening it to the open and closed vessels or vice versa, and a float in the open vessel operating the cocks so that water is supplied when the oat falls below a certain level and is cut od when the oat rises above that level.

2. An electric evaporating apparatus or boiler consisting of a closed Vessel, au open shallow Vessel in the closed vessel, electrodes passing through the walls of the closed vessei to the open vessel, a water-supply, a receiver or trap connected to the water-tank and at its top and to the closed vessel and at the bottom to the open vessel, three cocks for lsimultaneously closing the receiver to the water-supply and opening it to the open and closed vessels or vice versa, a makeandbreak switch in the circuit to the electrodes, a oat in the open vessel operating the cocks and the switch so that Water is supplied when the float falls below a certain level and is cut oft' when the float rises above that level and when it descends lower still breaks the current to the electrodes.

In testimony whereof I have affixed my signature in presence of two witnesses.

ROBERT COOKE SAYER. Witnesses:

LIONEL A. WILSON, GILBERT J. RIoKE'rTs. 

